"weight-saving" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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          "ref": "1979 August, Graham Burtenshaw, Michael S. Welch, “O.V.S Bulleid's SR loco-hauled coaches - 1”, in Railway World, page 396:",
          "text": "Because of attention to weight-saving No 5751 weighed much the same as the shorter Maunsell coaches.",
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      ],
      "glosses": [
        "An intentional reduction in the weight of an object."
      ],
      "id": "en-weight-saving-en-noun-BBeFxeQn",
      "synonyms": [
        {
          "word": "weight saving"
        },
        {
          "word": "weightsaving"
        }
      ],
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        "uncountable"
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  "word": "weight-saving"
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  "lang_code": "en",
  "pos": "noun",
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          "ref": "1979 August, Graham Burtenshaw, Michael S. Welch, “O.V.S Bulleid's SR loco-hauled coaches - 1”, in Railway World, page 396:",
          "text": "Because of attention to weight-saving No 5751 weighed much the same as the shorter Maunsell coaches.",
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        "An intentional reduction in the weight of an object."
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  "synonyms": [
    {
      "word": "weight saving"
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    {
      "word": "weightsaving"
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  "word": "weight-saving"
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